AM/FM radio and wire identification

Hi everyone,
I finally got around to pulling out the sorta/maybe/non-working AM/FM radio out of my '70 Dart I got in 2020. It is not the original radio as I later found out Darts didn't have one till '73 or so, so someone in the past added this in. Its fine with me it fits perfect in the non-rally dash and is period correct (as far as I'm concerned), but the FM doesnt seem to work at all and the AM sporadically at best. I'm going to send it to the repairman who salvaged the stereo in my old Chevy but I was hoping to first find the radio model number and see what wires are what coming out the back to aid with reinstallation. (I pulled the radio out from under the dash but couldnt see what wires were connected where)

There's several wires spliced in that are non-original from whoever installed it in the past. The red and orange wires have a plug end and that's easy enough to reconnect. The green wire was spliced to an orange wire, couldn't see what that was connected to but I can resplice it when installing. The black wire was spliced to another wire which disconnected itself from wherever while I was removing the radio. Again, I couldn't see what it was connected to.

Can someone educate me on what the red/orange, the green, and the black wires are? Is black the ground, red/orange power, and green the speaker? Id like to do better/ cleaner wire connections when re-installing. I tried googling the model radio to find out more info (because I feel stupid asking) but I cannot identify the model radio I have. Its a Motorola but couldn't find out any more info.

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Id be grateful for more info, thank you all !